Thanks to you all for your help. The solution to regenerate the list skipping the one to be deleted is fine for me since my lists are of moderate size and the operation is infrequent.
Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list
